Suzuki DF 50 Service Manual

6-65 POWER UNIT
OPERATION
WATER COOLING SYSTEM
The water cooling system includes the lower unit water pump, lower unit to power unit water supply tube, oil
pan water pressure valve, power unit water passages and thermostat.
This system cools both the power unit and exhaust and is shown in schematic from below.
If overheating occurs, the components of the cooling system must be inspected for blockage, corrosion build-
up or component damage.
Component inspection Refer to page
Water pump / Impeller........................... 9-9
Water tube.............................................7-5
Thermostat............................................6-64
Water pressure valve ............................7-5
Cylinder head........................................ 6-26
Cylinder block ....................................... 6-43
ENGINE HOLDER
OIL PUMP CASE
CYLINDER
THERMOSTAT
OIL PAN
OIL PAN
WATER TUBE
ENGINE HOLDER
PROPELLER
EXHAUST OUTLET
DRIVESHAFT
HOUSING
CYLINDER HEAD
EXHAUST
WATER JACKET
VAPOR
SEPARATOR
SUB-WATER
INTAKE
PRESSURE
VALVE
PILOT
WATER HOLE
WATER PUMP
When open
WATER INTAKE
WATER

Suzuki DF 50 Specifications

General

Engine Type	4-Stroke
Cylinders	3
Displacement	941 cc
Starting System	Electric
Steering	Remote
Engine Type Detail	DOHC 12-Valve
Maximum Output	50 HP
Ignition System	Digital CDI
Alternator	12V 19A
Gear Ratio	2.27:1
Exhaust	Through Prop Hub Exhaust
Trim Method	Power Trim and Tilt
Max Power	50 HP
Alternator Output	12V 19A
Fuel Delivery System	Sequential Multi Point Electronic Fuel Injection
Full Throttle Operating Range	5, 300 - 6, 300 rpm
Engine Oil Capacity	2.7 L
Full Throttle RPM Range	5300 - 6300 RPM
Oil Capacity	2.7 L
Bore x Stroke	72.5 x 76.0 mm (2.85 x 2.99 in.)